Ohmalloy CuNi44 (Cuprothal 294/MWS-294) Solid Heating Wire 0.4mm/0.67mm (8 AWG) Bare Resistivity 0.49 m 420MPa Ultimate
Price:
Negotiable
MOQ:
5KG
Delivery Time:
3-18 working days after payment confirmed
Brand:
OHMALLOY
Product Description
Ohmalloy CuNi44 (Cuprothal 294/MWS-294) Solid Heating Wire
Specifications: 0.4mm/0.67mm (8 AWG) Bare Resistivity 0.49 mΩ·mm²/m, 420MPa Ultimate Tensile Strength
Common Names: CuNi44, Cuprothal49, Alloy 294, Cuprothal 294, Alloy 49, CuNi 102, Cu-Ni 44, Konstantan, Constantan
OhmAlloy049 is a copper-nickel alloy (Cu56Ni44 composition) characterized by high electrical resistance, excellent ductility, and superior corrosion resistance. This alloy is suitable for continuous operation at temperatures up to 400°C.
Typical Applications:
- Temperature-stable potentiometers
- Industrial rheostats
- Electric motor starter resistances
Copper Nickel Alloy Production Standards (GB/T1234-95)
| Performance Brand | NC020 | NC025 | NC030 | NC035 | NC040 | NC050 | CuNi44 |
|---|---|---|---|---|---|---|---|
| Main Chemical Content % - Ni | 14.2 | 19 | 23 | 30 | 34 | 44 | 44 |
| Mn | 0.3 | 0.5 | 0.5 | 1.0 | 1.0 | 1.0 | 1.0 |
| Cu | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. |
| Element Max Working Temperature ℃ | 300 | 300 | 300 | 350 | 350 | 400 | 400 |
| Density g/cm³ | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 |
| Resistivity Ωmm²/m, at 20℃ | 0.20±5% | 0.25±5% | 0.30±5% | 0.35±5% | 0.40±5% | 0.49±5% | 0.49±5% |
| Temperature factor of resistivity 10⁻⁵/℃(200-600℃) | <38 | <25 | <16 | <10 | -0 | <-6 | <-6 |
| Melting Point ℃ | 1115 | 1135 | 1150 | 1170 | 1180 | 1280 | 1280 |
| Tensile Strength MPa | ≥310 | ≥340 | ≥350 | ≥400 | ≥400 | ≥420 | ≥420 |
| Elongation % (>1.0) | ≥25 | ≥25 | ≥25 | ≥25 | ≥25 | ≥25 | ≥25 |
Corrosion Resistance Performance
| Alloys | Working In atmosphere at 20℃ | Working at max temperature 200℃ |
|---|---|---|
| Air and oxygen contain gases | good | good |
| gases with Nitrogen | good | good |
| gases with sulfur oxidability | good | good |
| gases with sulfur reductibility | good | bad |
| carburization | bad | good |
Available Product Styles
| Alloys Name | Type | Dimension |
|---|---|---|
| OhmAlloy049W | Wire | D=0.06mm~8mm |
| OhmAlloy049R | Ribbon | W=0.4~40, T=0.05~2.9mm |
| OhmAlloy049S | Strip | W=8~200mm, T=0.1~3.0 |
| OhmAlloy049F | Foil | W=6~120mm, T=0.005~0.1 |
| OhmAlloy049B | Bar | Dia=8~100mm, L=50~1000 |
The addition of nickel to pure copper significantly enhances strength, corrosion resistance, hardness, electrical resistance, and thermoelectric properties while reducing the temperature coefficient of resistivity. Compared with other copper alloys, cupronickel offers superior mechanical and physical properties including excellent ductility, high hardness, attractive appearance, corrosion resistance, and deep drawing performance.
Industrial Applications:
- Shipbuilding industry corrosion-resistant structural components
- Petroleum, chemical, and construction sectors
- Power generation and electrical systems
- Precision instruments and medical equipment
- Musical instruments and decorative crafts
- Resistance elements and thermocouple materials
- Compensation wires and electrical components
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Company
Ohmalloy Material Co.,Ltd
Location
Room 311, No.1211, Mudanjiang Road, Baoshan district, Shanghai
Contact Person
Qiu